The disclosure comes less than two weeks after the lab announced that two removable computer discs containing classified nuclear weapons data were missing. That incident represents at least the third time since 2000 that storage media containing classified information have been lost in the facility.

In the latest incident, lab spokesman Kevin Roark confirmed a report that the lab recently discovered new incidents of classified information being sent through a nonclassified e-mail system.

The incidents, he said, occurred when scientists in the lab, which employs about 12,000 people, incorrectly judged information as being classified or unclassified and sent it without asking for assistance about the contents of their e-mails. The incidents are always promptly reported to the US Department of Energy and other agencies, as required by law, Roark said.

By Todd Weiss at Computer Weekly.

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